Prior to the amendment of Tamil Nadu Entertainments Tax Act 1939 on 22 July 2006, gross was 115 per cent of net for all films.[1] Post-amendment, gross equalled net for films with pure Tamil titles.[2] Commercial Taxes Department disclosed ₹13.18 crore in entertainment tax revenue for the year.[3] Producer Dhananjayan reports in his publication The Art & Business Of Cinema that the box office generated ₹525 crore in domestic net against an investment of ₹650 crore.
The following is a list of films produced in the Tamil cinema in India that were released in 2009.